Vulnerability in AWS Opensearch
CVE-2026-19311
Missing authorization in the Execute Monitor API in Amazon OpenSearch Alerting plugin might allow an authenticated remote user to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data source and input index parameters.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- AWS Opensearch — versions 2.4
- GitHub Opensearch — versions 2.4.0, 3.0.0
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-19311?
- CVE-2026-19311 is a high-severity vulnerability in AWS Opensearch, classified under CWE-475. CVSS score: 8.1/10. Published 2026-08-12.
- How severe is CVE-2026-19311?
- High severity. CVSS v3 base score is 8.1 out of 10.